Optical Local Area Network (lan) Patents (Class 398/58)
  • Patent number: 10491321
    Abstract: An optical demultiplexer has at least one unit circuit formed by three AMZs having a same arm length difference and cascaded in a tree structure in which two output ports of the 1st AMZ are connected to the 2nd AMZ and the 3rd AMZ, respectively, wherein the unit circuit has first and second monitors connected to the first and second output ports of the 2nd AMZ, and third and fourth monitors connected to the first and second output ports of the 3rd AMZ, a first control circuit controlling the transmissivity of the 1st AMZ so as to increase the monitoring result of the second and fourth monitors, a second control circuit controlling the transmissivity of the 2nd AMZ to decrease the monitoring result of the first monitor, and a third control circuit controlling the transmissivity of the 3rd AMZ to decrease the monitoring result of the third monitor.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 26, 2019
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Tomoyuki Akiyama
  • Patent number: 10484098
    Abstract: A method implemented at a transmitter in a passive optical network (PON), the method comprising the transmitter fragmenting a data packet into multiple frames, with each frame of the multiple frames including a data packet preamble, with the data packet preamble including an indicator associated with at least one lane to be used to transmit the data packet and a logical link identifier (LLID), the indicator identifying a first lane selected from a plurality of lanes, identifying at least one frame transmitted over the first lane, and identifying the lane order of the plurality of lanes, and the transmitter transmitting the multiple frames over the plurality of lanes.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: November 19, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Duane Remein, Frank Effenberger, Yuanqiu Luo
  • Patent number: 10454611
    Abstract: This spatial division multiplexing (SDM) in power-limited optical communication systems. In general, an SDM optical transmission system may be configured to increase data capacity over the data capacity of a non-SDM optical transmission system while maintaining power consumption at or below that of the existing non-SDM optical transmission system. To realize such an improvement in performance without increasing power consumption, an example SDM optical transmission may be constructed by reducing system bandwidth, reducing and/or altering equipment for filtering, reducing optical amplifier spacing, reducing operational amplifier power consumption, etc. In this manner, increased data transmission performance may be realized even where available power may be strictly limited.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: October 22, 2019
    Assignee: Subcom, LLC
    Inventors: Alexei Pilipetskii, Oleg V. Sinkin, Georg Mohs, Hussam G. Batshon, Neal S. Bergano
  • Patent number: 10439724
    Abstract: A passive optical network (PON) includes a first optical line terminal (OLT), a second OLT, and an optical network unit (ONU). The first OLT sends an equalization delay change message to the ONU, wherein the equalization delay change message includes an equalization delay, an upstream channel ID and a downstream channel ID corresponding to the equalization delay. The ONU receives the equalization delay change message. When the ONU tunes from the first OLT to the second OLT, the ONU obtains the equalization delay for upstream transmission according to the upstream channel ID and the downstream channel ID.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: October 8, 2019
    Assignee: Futurewei Technologies, Inc.
    Inventors: Xuming Wu, Yuanqiu Luo, Dekun Liu, Jianhe Gao
  • Patent number: 10404580
    Abstract: A method of network level protection route evaluation and remediation in a network includes defining thresholds for one or more services, wherein the thresholds define how many expected alternate protection routes are available for the one or more services for network level restoration; periodically evaluating a number of available alternate protection routes for the one or more services; notifying a network operator responsive to the number of available alternate protection routes being below the thresholds; and performing one or more remedial actions in the network based on the notifying.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: September 3, 2019
    Assignee: Ciena Corporation
    Inventor: Brahm Kumar
  • Patent number: 10397055
    Abstract: Certain embodiments described herein are generally directed to determining efficient update schedules for logical networks based on a graph representing the priority of features supported by the network, and a graph representing the priority of logical entities within the logical network. By building a graph of the logical network using directed edges to represent the update priority of one logical entity over another, an ordering, or a set of possible orderings, may be obtained. A topological sort of the graph may obtain such an ordering. Alternative orderings may indicate opportunities for parallel updating, which may result in a more efficient process for updating the logical network.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: August 27, 2019
    Assignee: Nicira, Inc.
    Inventors: Aayush Saxena, Aravinda Kidambi Srinivasan
  • Patent number: 10374714
    Abstract: A method for online switching of an operation mode of an ONT comprises: receiving an OMCI message in an online state by the ONT, wherein the OMCI message carries an indication message for switching the operation mode; and switching the operation mode according to the indication message by the ONT. The above-mentioned method realizes changing of an operation mode of an ONT in real-time in an online state based on the GPON standard, so that the ONT can flexibly operate in a gateway mode or a network bridge mode, and an operator management system only needs to change the operation mode of the ONT through a standard OMCI message according to a local network requirement.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: August 6, 2019
    Assignee: ZTE CORPORATION
    Inventors: Yangchun Zhang, Feng He, Sikun Xue
  • Patent number: 10367681
    Abstract: An example of high availability for FC or FCoE can include maintaining connection state information in a Fiber Channel over Ethernet (FCoE) Data Forwarder (FDF) or Fiber Channel Data Forwarder (FcDF). A failure of a first FCoE Forwarder (FCF) associated with the FDF can be detected. A second FCF can check a configuration file of the second FCF to see if the second FCF is responsible for the FDF. The second FCF can request the virtual domain ID, of the failed FCF, from a principal switch. The second FCF can be used as a service node for the FDF.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 30, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventor: Siamack Ayandeh
  • Patent number: 10361938
    Abstract: A method for measuring transmission delay of an optical transport network (OTN) device and a source OTN device. The method comprises: a source OTN device receives a delay measurement request transmitted by a user, generates a delay request frame, and transmits the delay request frame to a destination OTN device; the source OTN device receives a response frame returned from the destination OTN device, the response frame including a first time information; after receiving the response frame returned from the destination OTN device, the source OTN device obtains the system time T4 at when the response frame is received by the source OTN device; the source OTN device parses the response frame to obtain the first time information, and calculates the transmission delay between the source OTN device and the destination OTN device according to T4 and the first time information.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: July 23, 2019
    Assignee: ZTE Corporation
    Inventor: Kelu Huang
  • Patent number: 10348638
    Abstract: Concepts and technologies are disclosed herein for creating cross-service chains of virtual network functions in a wide area network. A controller can receive a chain request from a requestor. The chain request can specify functionality that is to be included in a service chain. The functionality can include a first function and a second function. The controller can compute a route associated with the service chain. The route can specify a first site that hosts a first service that provides the first function and a second site that hosts a second service that provides the second function. A first virtual network function can be located at the first site and a second virtual network function can be located at the second site. The controller can configure edge devices and forwarding devices to various entities at the two sites to enable the cross-service virtual network function chain.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: July 9, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Abhigyan, Kaustubh Joshi, Richard Schlichting, Matti Hiltunen, Yoji Ozawa
  • Patent number: 10341748
    Abstract: A method and system for packet-optical in-band telemetry (POINT) that may be used in a packet-optical network is disclosed herein. An intermediate POINT device may receive a packet including at least a header and a payload at a packet layer. The POINT device may read intent information from the header, and the intent information may indicate a type of telemetry data to be collected. The POINT device may translate the intent information from the packet layer to generate a device-specific action in an optical layer to the type of telemetry data indicated by the intent. The POINT device may execute the device-specific action in the optical layer to generate a response corresponding to the intent, associate the response with the intent, and encode the response in the packet layer for downstream data forwarding.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: July 2, 2019
    Assignee: Infinera Corporation
    Inventors: Madhukar Anand, Ramesh Subrahmaniam, Sanjoy Bardhan, Radhakrishna Valiveti
  • Patent number: 10341411
    Abstract: Methods, systems, and computer readable media for providing message encode/decode as a service are disclosed. According to one method for providing message encoding or decoding as a service, the method occurs at an encode/decode function (EDF) node. The method includes receiving a message encode or decode operation request containing a message identifier and an operation identifier. The method also includes performing, using the operation identifier, a message encode or decode operation involving accessing or modifying at least one TLV element decoded from a message indicated by the message identifier. The method further includes sending a response indicating whether the message encode or decode operation was successfully performed.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: July 2, 2019
    Assignee: Oracle International Corporation
    Inventors: Syed Mohsin Reza Zaidi, Lalit Grover
  • Patent number: 10334493
    Abstract: A communication system is described in which mobile telephones are able to roam between neighboring home node base stations and in which the home base stations or the home base station gateway devices are arranged to aggregate “Unsuccessfully Transmitted DL Data Volume” determined by previous home base stations served by the gateway device. In this way, when a call is transferred away from the gateway device or is released, a total aggregated value of “Unsuccessfully Transmitted DL Data Volume” can be provided to the core network for billing purposes.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 25, 2019
    Assignee: NEC CORPORATION
    Inventor: Suresh Ganapathy
  • Patent number: 10250348
    Abstract: In the optical transport system a transport frame generator divides a transport frame accommodating plural client signals into plural transmission signals. Subcarrier transmission units convert the signals into optical signals using different optical carriers and transmit the converted optical signals. Subcarrier reception units receive the transmitted optical signals and convert the optical signals into reception signals. A transport frame termination unit combines the reception signals to restore the transport frame. A time-demultiplexing processor time-demultiplexes the restored transport frame to be separated into the client signals. A time slot control unit determines a new time slot allocation when time-multiplexing the client signals in the transport frame and stops supply of electric power to a subcarrier transmission unit and a subcarrier reception unit that transmit and receive an optical signal to which the client signals are not allocated.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: April 2, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yoshiaki Yamada, Kengo Shintaku, Takuya Ohara, Kei Kitamura, Takashi Kotanigawa, Takafumi Hamano, Kaoru Arai, Masahiro Yokota, Hideki Maeda
  • Patent number: 10225008
    Abstract: A disclosed method for configuring an optical network includes determining that a measure of performance for a first optical path is approaching a safe threshold and designating the first optical path as at risk for performance degradation due to additional traffic. The method also includes, in response to adding a new optical path, calculating a system margin for the first optical path representing a difference between an OSNR delivered on the first optical path and a required OSNR for error-free operation on the first optical path, determining that the system margin is insufficient to meet an applicable performance level, modifying an operating parameter of a transmitter or receiver of the first optical path and refraining from calculating a system margin for a second optical path that is not designated as at risk for performance degradation. The method may be implemented by a network management system of the optical network.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: March 5, 2019
    Assignee: Fujitsu Limited
    Inventors: Olga I. Vassilieva, Inwoong Kim, Tadashi Ikeuchi
  • Patent number: 10200132
    Abstract: An optical communication system includes an optical transmitter, a plurality of optical receivers, and a splitter that splits light transmitted by the optical transmitter to the plurality of optical receivers. The optical transmitter includes a variable-wavelength light source capable of transmitting light of a first wavelength and light of a third wavelength between the first wavelength and a second wavelength. A first optical receiver of the plurality of optical receivers includes a first optical filter having a first transmission band including the first and third wavelengths, and a first receiving unit that receives light having passed through the first optical filter. A second optical receiver of the plurality of optical receivers includes a second optical filter having a second transmission band including the second and third wavelengths, and a second receiving unit that receives light having passed through the second optical filter.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 5, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Kyosuke Sone, Yasuhiko Aoki, Goji Nakagawa
  • Patent number: 10193630
    Abstract: A selection and distribution circuit (13) is provided between N optical transceivers (11) and one PON control circuit (12). The selection and distribution circuit (13) selects the optical transceiver (11) corresponding to an upstream frame that time-divisionally arrives, thereby transferring the upstream frame opto-electrically converted by the transceiver (11) to the PON control circuit (12) and distributing a downstream frame from the PON control circuit (12) to each optical transceiver (11). A power supply control circuit (23) stops power supply to at least one of one of optical transceivers (11) that are not used to transfer the frame of the optical transceivers (11) and a circuit that is not used to transfer the frame in the selection and distribution circuit (13). This can reduce the system cost per ONU in the optical transmission system.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: January 29, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Shoko Ohteru, Namiko Ikeda, Saki Hatta, Satoshi Shigematsu, Nobuyuki Tanaka, Kenji Kawai, Junichi Kato, Tomoaki Kawamura, Hiroyuki Uzawa, Yuki Arikawa, Naoki Miura
  • Patent number: 10148387
    Abstract: A method for detecting an optical network unit (ONU) in a passive optical network (PON), an ONU, a PON and an optical line terminal (OLT) are disclosed. In an embodiment the method include detecting an ONU identity code in an open uplink empty window or an empty timeslot, wherein the ONU identity code is a specific code stream sequence of the ONU that identifies a single ONU of the plurality of ONUs included in the PON system during the open uplink empty window or the empty timeslot and determining that the single ONU corresponding to the ONU identity code is a rogue ONU according to the ONU identity code.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: December 4, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Min Wan, Xiaofei Zeng
  • Patent number: 10123101
    Abstract: Embodiments of the invention disclose a communication method which includes: receiving, by the optical network unit (ONU) by using the first port or the second port, a wavelength switching request message delivered by the optical line terminal (OLT), where the wavelength switching request message carries second wavelength channel information and port information that is of the second port; switching, by the ONU, an operating wavelength channel of an optical module connected to the second port from a first wavelength channel to a second wavelength channel corresponding to the second wavelength channel information; and sending, by the ONU, a wavelength switching complete message to the OLT by using the first port. According to the communication method provided in embodiments of the present invention, quick wavelength switching is performed based on the second port, so that a service is not interrupted in a wavelength switching process, and user experience is better.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: November 6, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhicheng Ye, Shengping Li, Bo Gao
  • Patent number: 10122586
    Abstract: Adjacency detection systems and methods configured to detect physical interconnection between two devices in a network include communicating data with one or more controllers and data sources associated with the network; for a given port in the network to detect a corresponding port physically connected thereto, causing orchestration of changes in performance monitoring data for the given port over a period of time; and analyzing the data subsequent to the orchestration to detect the corresponding port. The systems and methods can operate over multiple network layers, with different vendor equipment, independent of network protocols, and in-service.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: November 6, 2018
    Assignee: Ciena Corporation
    Inventors: Aung Htay, Mallikarjunappa Kore, Yuan-Ning Weng
  • Patent number: 10110438
    Abstract: A method for control plane discovery includes a plurality of network elements transmitting an outbound control plane communication to generate path information of a path through the network elements. The transmitting includes receiving, by an intermediate network element of the network elements, the outbound control plane communication on an optical layer ingress port, appending, by the intermediate network element, an intermediate network element identifier of the intermediate network element to the path information in the outbound control plane communication, and transmitting, by the intermediate network element, the outbound control plane communication via an electrical layer egress port based on the intermediate network element comprising a layer changing drop port.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: October 23, 2018
    Assignee: Ciena Corporation
    Inventors: Anurag Prakash, Mohit Chhillar, Dominic Richens, Seemant Bisht
  • Patent number: 10097262
    Abstract: Client-side protection systems and methods are implemented by a network element using a fast electrical squelch with a first optical transceiver and a second optical transceiver. A client-side protection method includes detecting a protection switching event affecting one or more lanes associated with the first optical transceiver; causing a fast electrical squelch to the affected one or more lanes of the first optical transceiver to provide a Loss of Signal (LOS) thereto; and subsequent to the LOS to the first electrical transceiver, causing a fast electrical squelch to corresponding one or more lanes of the second optical transceiver to enable the corresponding one or more lanes thereon.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: October 9, 2018
    Assignee: Ciena Corporation
    Inventors: Eric Maniloff, Ronald Hoffe
  • Patent number: 10069717
    Abstract: This disclosure generally discloses a path search mechanism for determining mutually compatible paths within a network includes nodes and links. The path search mechanism for determining mutually compatible paths may be configured to determine a set of mutually compatible paths for a set of demands where the demands may include requests for paths between pairs of nodes of the network. The path search mechanism for determining mutually compatible paths may be configured to determine a set of mutually compatible paths for a set of demands where compatibility may be based on edge disjointness, node disjointness, or the like, as well as various combinations thereof. The path search mechanism for determining mutually compatible paths may be configured to determine a set of mutually compatible paths for a set of demands subject to an objective.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: September 4, 2018
    Assignee: Nokia of America Corporation
    Inventor: Gary W. Atkinson
  • Patent number: 10063335
    Abstract: The present disclosure discloses a method for remotely configuring a Precision Time Protocol PTP service of an Optical Network Unit ONU. The method includes: after an ONU performs an initialization, the ONU creates a PTP management entity; the ONU receives a PTP management entity attribute sent by an OLT and set by the OLT; and the ONU parses the PTP management entity attribute sent by the OLT and sets a corresponding PTP service according to the PTP management entity attribute. The present disclosure further discloses an ONU, an OLT and a system corresponding to the method.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: August 28, 2018
    Assignee: ZTE Corporation
    Inventors: Qingguo Zhang, Jianmei Liu
  • Patent number: 10009095
    Abstract: An optical communications network has an interconnecting node (100) coupled in between at least one hub node (130) and at least first (140) and second (150) access nodes, to provide working and protection optical paths. The interconnecting node has a working wavelength selective switch (110) to select which working wavelengths are coupled. A corresponding protection wavelength selective switch (120) is also provided for the protection wavelengths. In the event of detection of a fault, protection switching (230) is carried out at the access node and the hub node without altering the selections made by the wavelength selective switches in the interconnecting node. Thus protection schemes across the interconnecting node for more than one access node can be handled. By not needing to alter wavelength selections at the interconnecting node during protection switching operation, the complexity and thus costs can be reduced.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: June 26, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Giulio Bottari, Luca Giorgi, Peter Öhlén, Björn Skubic
  • Patent number: 9980354
    Abstract: Disclosed are a lighting system and a method for registering a lighting device. The embodiments of the present invention comprise: a lighting device which is provided with a short-range communication module and comprises a plurality of light-emitting units; a lighting registration device which is provided with a short-range communication module and an IR communication module and registers the lighting device on the basis of the light-emitting patterns of the light-emitting units; and a lighting switch which is provided with a short-range communication module, binds with the lighting device by receiving, from the lighting registration device, an ID corresponding to the light-emitting patterns of the light-emitting units, and controls the operation of the lighting device.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: May 22, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Duksung Kim, Myungbok Yoo, Sijeong Ro
  • Patent number: 9979505
    Abstract: A wall-mountable outlet comprising an enclosure and a faceplate mechanically coupled to the enclosure. An optical network terminal (ONT) is provided in the enclosure. In one example embodiment, the ONT comprises an optical-electrical (O-E) data module, and the O-E data module comprises an O-E converter. The O-E data module can further comprise a switch arranged to selectively couple at least one signal with the O-E converter. The O-E data module further can comprise a Passive Optical Network (PON) controller interposed between the O-E converter and the switch.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: May 22, 2018
    Assignee: TELLABS ENTERPRISE, INC.
    Inventors: Richard Schroder, Russell W. Brown, Thomas C. Ruvarac, John Silovich, Andrew G. Low
  • Patent number: 9961138
    Abstract: Systems and methods use a fiber-based network to provide both network access services such as Internet, television, phone, and wide area networking services as well as distributed data processing services. Distributed computing nodes are provided in broadband gateways at homes and other premises in a fiber-based network to realize a distributed data center architecture. In a specific example, a provider deploys a number of broadband gateways in the homes of homeowners who agree to pay for network access (e.g., Internet, phone, television, etc.) that is received over a fiber-based (preferably point-to-point) network at the broadband gateways in the homes. Those broadband gateways also separately provide distributed workload processing. Providing both network access and distributed workload processing makes the deployment and use of the fiber-based network more economically and technically feasible.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: May 1, 2018
    Inventor: Justin G. Lelacheur
  • Patent number: 9948388
    Abstract: There is provided a network management device to manage a network on which an existing optical path is operated, the network management device including: a first receiver configured to receive data related to a measurement result of signal quality of a first optical signal having a first wavelength on the existing optical path; a second receiver configured to receive a request for adding a second optical signal having a second wavelength to the existing optical path; at least one memory configured to store a procedure; and at least one processor configured to execute the procedure of estimating a variation quantity in the signal quality of the first optical signal when the second optical signal is added to the existing optical path based on the data related to the measurement result, when the request is received, and determining whether to add the second optical signal based on results of the estimating.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: April 17, 2018
    Assignee: FUJITSU LIMITED
    Inventor: Rikiya Watanabe
  • Patent number: 9900100
    Abstract: The present invention relates to an optical line terminal capable of communicating with a plurality of optical network units. The optical line terminal includes an obtaining unit that performs an obtaining process that obtains configuration information for each of the optical network units from another apparatus; and a configuring unit that performs a configuration process that transmits a part or all of the configuration information obtained by the obtaining unit to the each of the optical network units. The obtaining unit performs the obtaining process for each of the optical network units in an order determined according to a priority of the each of the optical network units.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: February 20, 2018
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kenjiro Fujino, Hideyuki Tanaka, Kazutaka Kawamoto
  • Patent number: 9887874
    Abstract: In one embodiment, a plurality of paths in a network from a source device to a destination device is identified. A predicted performance for packet delivery along a primary path from the plurality of paths is determined. The predicted performance for packet delivery along the primary path is then compared to a performance threshold. Traffic sent along the primary path may be duplicated onto a backup path selected from the plurality of paths based on a determination that the predicted performance along the primary path is below the performance threshold.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: February 6, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Jean-Philippe Vasseur, Sukrit Dasgupta
  • Patent number: 9883335
    Abstract: Disclosed herein are a handheld device and method for measuring the quality of an optical link, which are capable of simultaneously measuring the strength of an optical signal and the quality of an optical link at an optical network terminal in a Fiber-to-the-Home (FTTH) network. A presented handheld device for measuring a quality of an optical link includes an optical signal input port for receiving an optical signal, an optical power measurement unit for measuring a power of the optical signal, an output unit for outputting one or more of a measured power value of the optical signal and results of quality measurement of an optical link, based on interworking with an optical network terminal, and a control unit for storing the measured power value of the optical signal and performing a process for quality measurement of the optical link.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: January 30, 2018
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Chang Kim, Geun-Yong Kim, Jae-In Kim, Hark Yoo, Dong-Soo Lee
  • Patent number: 9882838
    Abstract: Systems, mechanisms, apparatuses, and methods are disclosed for forwarding Inter-Switch Connection (ISC) frames in a Network-to-Network Interconnect (NNI) topology, for example, via a network switch which includes a first physical switch port to receive a physical switch link from a second network switch; logic to implement a first logical ISC and a second logical ISC? connection to the second network switch via the physical switch link; a second physical switch port to receive an interface connection from a third network switch; and switch forwarding logic to forward frames received at the first network switch to the second network switch via the logical ISC or logical ISC? based on whether or not the physical switch link is part of an active topology upon which the network switch operates or is not part of the active topology upon which the network switch operates. Other embodiments are disclosed.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: January 30, 2018
    Assignee: Extreme Networks, Inc.
    Inventor: Stephen R. Haddock
  • Patent number: 9883260
    Abstract: A MSO deploying a standard OLT, and installed with ONUs to be used by customers to whom the MSO can connect using optical fiber. For customers that cannot be reached with optical fiber, the MSO deploys a converter between the optical fiber and the coax network so that the MSO can use the same standard OLT, and use CNUs for those customers attached to the coax network.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: January 30, 2018
    Assignee: Entropic Communications LLC
    Inventor: Wu Zong
  • Patent number: 9838150
    Abstract: Embodiments of the present invention disclose a method and an apparatus for detecting an ONU, and a passive optical network system. The method includes detecting an identity code of an ONU in an open uplink empty window or an empty timeslot, and determining that an ONU corresponding to the identity code of the ONU is a rogue ONU according to the identity code of the ONU. A corresponding apparatus and passive optical network system are also provided in the embodiments of the present invention. In the passive optical network system, a rogue ONU is detected and determined quickly and efficiently, and an effect on an uplink service is reduced.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 5, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Min Wan, Xiaofei Zeng
  • Patent number: 9832771
    Abstract: Provided is a game apparatus which stores, in an outbox for individual-transmission data, individual-transmission data the destinations of which are individually specified, and stores, in an outbox for universal-transmission data, universal-transmission data the destinations of which are all terminals. A plurality of pieces of data is stored in the outbox for individual-transmission data, and information regarding the destination thereof and the information regarding the source thereof are added to each piece of data. When the outbox for individual-transmission data is full, all data stored in the outbox is retrieved, and one frame which includes the plurality of pieces of data is generated and transmitted.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: November 28, 2017
    Assignee: Nintendo Co., Ltd.
    Inventor: Manabu Okajima
  • Patent number: 9807480
    Abstract: An optical access network comprises an optical network unit having a first port for connecting to a first optical link, a second port for connecting to a second optical link and an optical source. The optical source is arranged to generate a first optical signal, to transmit the first optical signal via the first port, to receive an optical seed signal via the first port and to amplify the optical seed signal. The optical seed signal has a narrower bandwidth compared to the first optical signal. A modulator is arranged to modulate the amplified optical seed signal with upstream data to form an upstream optical signal and to transmit the upstream optical signal via the second port. A polarisation modifier can modify polarisation of the first optical signal.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: October 31, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Ernesto Ciaramella, Marco Presi
  • Patent number: 9762298
    Abstract: To reduce a bandwidth required for an optical transmission path (30) in a base station system including an RAU (21) for performing MIMO transmission using a plurality of antenna elements and a BBU (11), in a communication control method of the present invention, the BBU (11) transmits antenna weight coefficient information indicative of antenna weight coefficients of a plurality of antenna elements (205) and a transmission signal, and the RAU (21) multiplies the transmission signal from the BBU (11) by each of the antenna weight coefficients to generate weighted signals of the plurality of antenna elements (205), and transmits the weighted signals from the plurality of antenna elements (205).
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: September 12, 2017
    Assignee: NTT DOCOMO, INC.
    Inventors: Takahiro Kubo, Takahiro Asai, Jiyun Shen, Satoshi Suyama, Yukihiko Okumura
  • Patent number: 9760504
    Abstract: Keys are generated at a memory device with a period of time elapsing between generation of each key. A request is received from a memory controller for the most recently generated key. The memory device communicates the first key to the memory controller. Access to nonvolatile memory on the memory device is locked. An unlock command with a second key is received from the memory controller. The memory device determines that the second key matches the first key and unlocks access to the nonvolatile memory in response.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: September 12, 2017
    Assignee: International Business Machines Corporation
    Inventors: Diyanesh B. Chinnakkonda Vidyapoornachary, Stephen P. Glancy, Hillery C. Hunter, Charles A. Kilmer, Kyu-hyoun Kim, Warren E. Maule, Vipin Patel
  • Patent number: 9755746
    Abstract: The physical layer of an optical line terminal (OLT) of an optical network is split across multiple fibers so that the OLT has a plurality of optical transceivers for respectively communicating across a plurality of optical fibers. Thus, each optical transceiver is in communication with a smaller number of optical network units (ONUs) relative to an embodiment for which a single optical transceiver is employed, thereby reducing the transmit power requirements of the optical network. Accordingly, less expensive optical components, such as lasers, can be used at the OLT and the ONUs. In addition, the split at the OLT is implemented digitally, and the digital components of the OLT are arranged such that various performance benefits are realized. As an example, the OLT may be configured such that data and/or overhead may be simultaneously transmitted in the upstream direction thereby increasing the upstream throughput and capacity of the optical network.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: September 5, 2017
    Assignee: ADTRAN, Inc.
    Inventor: Thomas Frederick Detwiler
  • Patent number: 9749078
    Abstract: Techniques, apparatus and systems are described for accommodating the optical network units (ONUs) having different nominal upstream bitrates on the same passive optical network (PON) system by making the specified burst preamble and the bandwidth map allocation record format invariant with respect to the nominal upstream bitrate of a target ONU. The disclosed techniques, apparatus and systems allow seamless evolution of the lower-bitrate services to higher-bitrate services offered to an end-user without need to upgrade the central office equipment. In addition they can avoid the adverse consequences of inadvertently connecting a high-upstream-bitrate ONU to a lower-upstream-bitrate network.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 29, 2017
    Assignees: ZTE Corporation, ZTE (USA), Inc.
    Inventors: Denis Andreyevich Khotimsky, Liquan Yuan, Dezhi Zhang
  • Patent number: 9749039
    Abstract: A portable device is brought into a data center for testing connectivity between a customer and a service provider. A user of the device uses the device to requests ticket and customer information from a service provider in order to obtain more information about a particular task. The user plugs a cable into the device and performs a series of diagnostic tests on the connection. The device is configured to display the results of the diagnostic tests and any associated errors. The user of the device performs one or more actions based on the results of the diagnostic tests.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: August 29, 2017
    Assignee: Amazon Technologies, Inc.
    Inventors: Po-Chun Chen, David Brian Lennon, Patrick Brigham Cullen, Daniel Thomas Robinson, Jawash Mohamed, Alexander Justin Penney, Kevin Christopher Miller, Marwan Salah Oweis
  • Patent number: 9734095
    Abstract: Keys are generated at a memory device with a period of time elapsing between generation of each key. A request is received from a memory controller for the most recently generated key. The memory device communicates the first key to the memory controller. Access to nonvolatile memory on the memory device is locked. An unlock command with a second key is received from the memory controller. The memory device determines that the second key matches the first key and unlocks access to the nonvolatile memory in response.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: August 15, 2017
    Assignee: International Business Machines Corporation
    Inventors: Diyanesh B. Chinnakkonda Vidyapoornachary, Stephen P. Glancy, Hillery C. Hunter, Charles A. Kilmer, Kyu-hyoun Kim, Warren E. Maule, Vipin Patel
  • Patent number: 9705632
    Abstract: Embodiments of the present invention disclose a method and an apparatus for detecting an ONU, and a passive optical network system. The method includes detecting an identity code of an ONU in an open uplink empty window or an empty timeslot, and determining that an ONU corresponding to the identity code of the ONU is a rogue ONU according to the identity code of the ONU. A corresponding apparatus and passive optical network system are also provided in the embodiments of the present invention. In the passive optical network system, a rogue ONU is detected and determined quickly and efficiently, and an effect on an uplink service is reduced.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: July 11, 2017
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Min Wan, Xiaofei Zeng
  • Patent number: 9667376
    Abstract: An optical line terminal (OLT) comprises a receiver configured to receive a first message, a processor coupled to the receiver and configured to process the first message, and generate a second message based on the first message, wherein the second message comprises an identification (ID) structure identifying a traffic-bearing entity associated with an optical network unit (ONU), and wherein the ID structure comprises a wavelength ID field, and a transmitter coupled to the processor and configured to transmit the second message.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: May 30, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Yuanqiu Luo, Frank Effenberger, Bo Gao
  • Patent number: 9661404
    Abstract: An optical line terminal (OLT) device and an implementation method thereof, relate to the field of a passive optical network (PON). The OLT device includes an interface unit for receiving data in an Ethernet format sent by a service processing apparatus, performing protocol processing on the received data in the Ethernet format, converting the data after the protocol processing into a transmission signal corresponding to a sending interface, and then transmitting the transmission signal to an external device, as well as receiving message data sent by the external device, converting the message data for protocol processing corresponding to the service processing apparatus, converting the signal after the protocol processing into data in the Ethernet format, and transmitting the data to the service processing apparatus; the service processing apparatus performing service processing on the data transmitted by the interface unit, and transmitting the processed data to the interface unit.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: May 23, 2017
    Assignee: ZTE CORPORATION
    Inventors: Lei Yan, Rongqin Yan, Zhenli Yang, Mingshi Sun, Wei Huang, Yongfeng Zhou
  • Patent number: 9634792
    Abstract: A method and apparatus of tuning a signal received from a first network terminal at a second network terminal is disclosed. The method may include receiving the signal at the second network terminal. The signal may be operating at a first wavelength. The method may also include determining a port used to receive the signal at the second network terminal, and identifying a predetermined port wavelength used as a basis to shift the first wavelength to the predetermined port wavelength for subsequent signals received. The method may also include transmitting the predetermined port wavelength information to the first network terminal to inform the first network terminal to tune subsequent signals to the desired wavelength for the port.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: April 25, 2017
    Assignee: Alcatel Lucent
    Inventors: Joseph L. Smith, Wolfgang W. Pohlmann
  • Patent number: 9553661
    Abstract: A network element operating in an Optical Transport Network (OTN) network and configured to adaptively preconfigure OTN connections includes one or more ports, each port including hardware supporting an Optical channel Transport Unit level k (OTUk) configured to transport an Optical channel Data Unit level k (ODUk) or one or more Optical channel Data Unit level j's (ODUj's), j<k; wherein, when a port of the one or more ports is installed with an idle connection, the port is automatically preconfigured in either a connection mode for the ODUk or a trail termination mode for the one or more ODUj's based on existing OTN connections in the OTN network.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: January 24, 2017
    Assignee: Ciena Corporation
    Inventors: Hongxing Meng, Abhishek Chaudhary, Saravanan Purushothaman, David McDonald, Veena Alevoor
  • Patent number: 9538264
    Abstract: An Optical channel Data Unit flex (ODUflex) resizing method, node, and network include determining that the ODUflex needs resizing, wherein the ODUflex is configured in the network on a current path between the node and a second node in the network; when the resizing is a decrease, reducing a size of the ODUflex by i) a resize decrease operation using a control plane or ii) a Link Aggregation Group and Make-Before-Break operation; and, when the resizing is an increase, increasing a size of the ODUflex by i) a resize increase operation using a control plane or ii) a Link Aggregation Group and Make-Before-Break operation. The method provides hitless resizing without using ITU Recommendation G.7044/Y.1347 (10/11) and can perform the reducing or the increasing changing bandwidth of the ODUflex by approximately 100 G in less than a second.
    Type: Grant
    Filed: September 18, 2014
    Date of Patent: January 3, 2017
    Assignee: Ciena Corporation
    Inventors: Steven Arvo Surek, Jeffery Thomas Nichols, Jeffrey Scott Moynihan, Mohit Chhillar, Anurag Prakash, Alexander Gurd Young
  • Patent number: 9531492
    Abstract: The invention relates to techniques for controlling a dynamic hitless resizing in data transport networks. According to a method aspect of the invention, a network connection comprises M tributary slots defined in a payload area of a higher order transport scheme of the data transport network and the method comprises the steps of receiving a connection resize control signal at each of the nodes along the path of the network connection; adding at each node along the path in response to the connection resize control signal a second set of N tributary slots to the first set of the M tributary slots, such that the network connection comprises M+N tributary slots; and increasing, after M+N tributary slots are available for the network connection at each node along the path, a transport data rate of the network connection.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: December 27, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Maarten P. J. Vissers, Hubertus Adrianus Maria Van Helvoort, Yang Yang, Wei Su